There are duplicates of many of the cards, and while I don't have instructions, I would guess that the cards are shuffled and then drawn to decide plays. The line drawings are color-coded, so it's possible that different colors were in different stacks based on move choices by the player.
Yellow cards are batting-oriented, pink are pitchers. Green are baserunning plays while blue are fielding. If I were playing, I'd shuffle the yellow and pink together, and blue and green together, and choose a yellow-pink card to determine most plays.
This card is labeled "Steal Out".
It's a basic game, but it could be fun for younger kids who can't handle more-complicated trading card games.